.btn {
    display: inline-block;
    padding: 6px 12px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    font-size: 14px;
    font-weight: 400;
    line-height: 1;
    cursor: pointer;
    border-radius: 4px;
    border: 1px solid transparent;
    user-select: none;
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
}
.btn:hover{filter:alpha(Opacity=80);-moz-opacity:.8;opacity:.8}
.btn:focus{
    outline: none;
}

.btn-blue{
    background-image: linear-gradient(to top,#39A4D6,#3BA7DA,#3EABDD,#42AFE2,#45B3E6);
    background-image: -moz-linear-gradient(to top,#39A4D6,#3BA7DA,#3EABDD,#42AFE2,#45B3E6);
    background-image: -webkit-linear-gradient(to top,#39A4D6,#3BA7DA,#3EABDD,#42AFE2,#45B3E6);
    background-image: -ms-linear-gradient(to top,#39A4D6,#3BA7DA,#3EABDD,#42AFE2,#45B3E6);
    color: white;
    font-family: 'Microsoft Yahei','微软雅黑';
}